I would highly recommend the middleweight (8.5). The only thing I was disappointed in is that I was in between sizes. I am 5'5" and weigh 166 lbs which would not put me at exactly 3 but more at a 3 and a half. Anyway, after extensively reading all the reviews about sizes, quality etc. Unfortunately, I did not follow my gut feeling and went ahead and purchased a size 5; it goes without saying that this uniform was gigantic on me even after I washed and dried it a few times. With that said I decided that I would go with my first instinct and order the size 3 and boy I am I happy that I did. The jacket fits great and the pants fits perfectly (I could do with an inch or two in the waistline); nonetheless, this uniform gets two thumbs up... way up. The KD brand is my first gi and I am so pleased that I choose this brand because the 8.5 quality is superb and have minimal to no shrinkage once washed in cold water and line dried.   Permalink